/* ═══════════════════════════════════════════════
   Nautime — Styles partagés (global)
   ═══════════════════════════════════════════════ */

:root {
  --bg:           #FFFFFF;
  --surface:      #FAFAFA;
  --fg:           #1A1A1A;
  --muted:        #999999;
  --border:       #E5E5E5;
  --accent:       #2C2C2C;
  --accent-hover: #1A1A1A;
  --gold:         #B8860B;
  --font:         'Inter', system-ui, sans-serif;
  --ease-smooth:  cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-expo:    cubic-bezier(0.16, 1, 0.3, 1);
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: auto; }
body {
  font-family: var(--font);
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  font-size: 16px;
  line-height: 1.6;
}
img { display: block; max-width: 100%; height: auto; }
a { text-decoration: none; color: inherit; }
button { border: none; background: none; cursor: pointer; font: inherit; }

/* ─── NAV ─── */
header { position: fixed; top: 0; left: 0; right: 0; z-index: 110; }
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 3rem;
  background: transparent;
  transition: all 0.4s var(--ease-smooth);
}
.nav.scrolled {
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 1rem 3rem;
}
.nav-logo {
  font-size: 1rem;
  font-weight: 300;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}
.logo-nau { color: var(--muted); font-weight: 300; }
.logo-time { color: var(--fg); font-weight: 400; }
.nav-links {
  display: none;
  list-style: none;
  align-items: center;
  gap: 2.5rem;
}
.nav-links a {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  transition: color 0.3s;
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--gold);
}
.nav-cta {
  padding: 0.6rem 1.5rem;
  background: var(--accent);
  color: #fff !important;
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: background 0.3s;
}
.nav-cta:hover {
  background: var(--accent-hover);
  color: #fff !important;
}
/* ─── BURGER ─── */
.burger {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 6px;
  width: 28px;
  height: 28px;
  justify-content: center;
  cursor: pointer;
  z-index: 120;
  background: none;
  border: none;
}
.burger span {
  display: block;
  height: 1.5px;
  background: var(--fg);
  transition: all 0.4s var(--ease-expo);
  will-change: transform;
  transform-origin: center;
}
.burger.open span:first-child { transform: translateY(3.75px) rotate(45deg); }
.burger.open span:last-child  { transform: translateY(-3.75px) rotate(-45deg); }

/* ─── MENU OVERLAY ─── */
.menu-ov {
  position: fixed;
  inset: 0;
  z-index: 109;
  background: var(--bg);
  clip-path: inset(0 0 100% 0);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 2rem;
}
.menu-ov.is-open { pointer-events: auto; }
.menu-link {
  font-size: 1.8rem;
  font-weight: 300;
  letter-spacing: 0.04em;
  opacity: 0;
  transform: translateY(70px);
  display: flex;
  align-items: baseline;
  gap: 1rem;
}
.menu-num {
  font-size: 0.65rem;
  color: var(--gold);
  letter-spacing: 0.15em;
}

/* ─── LABELS ─── */
.label {
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 1.5rem;
}
.label-gold {
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
}

/* ─── BUTTONS ─── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.95rem 2.2rem;
  background: var(--accent);
  color: #fff;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transition: background 0.3s, gap 0.4s var(--ease-expo);
  position: relative;
  overflow: hidden;
  isolation: isolate;
}
.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-hover);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.45s var(--ease-expo);
  z-index: -1;
}
.btn:hover { gap: 1.1rem; }
.btn:hover::before { transform: scaleX(1); }
.btn svg { flex-shrink: 0; }

/* ─── SECTIONS ─── */
.section { padding: 8rem 3rem; }
.section-surface { background: var(--surface); }
.section-header {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 4rem;
  margin-bottom: 5rem;
  align-items: end;
}
.section-title {
  font-size: clamp(1.8rem, 3.5vw, 3rem);
  font-weight: 300;
  line-height: 1.15;
  letter-spacing: -0.01em;
}
.section-desc {
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.75;
  max-width: 440px;
}

/* ─── PAGE CONTAINER (texte) ─── */
.page-container {
  max-width: 780px;
  margin: 0 auto;
  padding: 8rem 3rem 4rem;
}

/* ─── FOOTER ─── */
footer {
  padding: 2rem 3rem;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}
.footer-logo {
  font-size: 0.8rem;
  font-weight: 300;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.footer-links {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.footer-links a {
  font-size: 0.68rem;
  color: var(--muted);
  letter-spacing: 0.04em;
  transition: color 0.3s;
}
.footer-links a:hover { color: var(--fg); }
.footer-sep {
  color: var(--border);
  font-size: 0.6rem;
}
.footer-copy {
  font-size: 0.7rem;
  color: var(--muted);
  letter-spacing: 0.05em;
}

/* ─── MODAL DEMO ─── */
.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 9000;
  background: rgba(26,26,26,0.35);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  opacity: 0;
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}
.modal-backdrop.is-open { pointer-events: auto; }

.modal {
  background: var(--bg);
  width: 100%;
  max-width: 520px;
  max-height: 90vh;
  overflow-y: auto;
  padding: 3.5rem 3.5rem 3rem;
  position: relative;
  transform: translateY(40px) scale(0.97);
  opacity: 0;
}

.modal-close {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 2;
  color: var(--border);
  transition: color 0.3s;
}
.modal-close:hover { color: var(--fg); }

.modal-label {
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 1.5rem;
}
.modal-title {
  font-size: clamp(1.4rem, 2.8vw, 1.8rem);
  font-weight: 300;
  line-height: 1.2;
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}
.modal-sub {
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.75;
  margin-bottom: 2.5rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--border);
}

.modal-form {
  display: flex;
  flex-direction: column;
  gap: 1.8rem;
}
.modal-field {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.modal-field label {
  font-size: 0.62rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.5rem;
}
.modal-field input,
.modal-field textarea {
  font-family: var(--font);
  font-size: 0.85rem;
  font-weight: 300;
  color: var(--fg);
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--border);
  padding: 0.6rem 0;
  outline: none;
  transition: border-color 0.4s var(--ease-smooth);
  -webkit-appearance: none;
  border-radius: 0;
}
.modal-field input:focus,
.modal-field textarea:focus {
  border-bottom-color: var(--gold);
}
.modal-field input::placeholder,
.modal-field textarea::placeholder {
  color: #ccc;
  font-weight: 300;
}
.modal-field textarea {
  resize: none;
  min-height: 60px;
  line-height: 1.7;
}

.modal-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.8rem;
}

.modal-submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  width: 100%;
  padding: 1.1rem 2rem;
  background: var(--accent);
  color: #fff;
  font-family: var(--font);
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border: none;
  cursor: pointer;
  margin-top: 1rem;
  transition: background 0.3s, gap 0.4s var(--ease-expo);
  position: relative;
  overflow: hidden;
  isolation: isolate;
}
.modal-submit::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-hover);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.45s var(--ease-expo);
  z-index: -1;
}
.modal-submit:hover { gap: 1.1rem; }
.modal-submit:hover::before { transform: scaleX(1); }
.modal-submit:disabled { opacity: 0.4; cursor: not-allowed; }
.modal-submit:disabled::before { transform: scaleX(0); }
.modal-submit svg { flex-shrink: 0; }

.modal-success {
  text-align: center;
  padding: 3rem 1rem;
}
.modal-success-icon {
  width: 52px;
  height: 52px;
  border: 1px solid var(--gold);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 2rem;
  color: var(--gold);
}
.modal-success h3 {
  font-size: 1.15rem;
  font-weight: 300;
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}
.modal-success p {
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.75;
}

/* ─── CROSS-CTA ─── */
.cross-cta {
  padding: 8rem 3rem;
  background: var(--surface);
  text-align: center;
  border-top: 1px solid var(--border);
}
.cross-cta-inner {
  max-width: 580px;
  margin: 0 auto;
}
.cross-cta-title {
  font-size: clamp(1.6rem, 3vw, 2.5rem);
  font-weight: 300;
  line-height: 1.15;
  margin: 1.5rem 0;
  letter-spacing: -0.01em;
}
.cross-cta-desc {
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.75;
  margin-bottom: 2.5rem;
}

/* ─── GRAIN OVERLAY ─── */
body::after {
  content: '';
  position: fixed; inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 9998;
  opacity: 0.12;
  mix-blend-mode: overlay;
}

/* ─── REDUCED MOTION ─── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ─── RESPONSIVE ─── */
@media (max-width: 768px) {
  .nav { padding: 1rem 1.5rem; }
  .nav.scrolled { padding: 0.8rem 1.5rem; }

  .section { padding: 4rem 1.5rem; }
  .section-header {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin-bottom: 3rem;
  }

  .page-container { padding: 6rem 1.5rem 3rem; }

  .modal { padding: 2.5rem 1.5rem 2rem; }
  .modal-row { grid-template-columns: 1fr; gap: 1.8rem; }
  .modal-sub { margin-bottom: 2rem; padding-bottom: 2rem; }

  .cross-cta { padding: 5rem 1.5rem; }

  footer { padding: 1.5rem; flex-direction: column; gap: 0.5rem; text-align: center; }
  .footer-links { flex-wrap: wrap; justify-content: center; }
}